Use the drop-down menus to complete the sentences describing the important ideas in Hess’s theory.
✔ mid-ocean ridgescontinents deep-ocean trenches
A✔ BCD
According to Hess’s theory, what might happen if the magma under a mid-ocean ridge cools?
What evidence supports Hess’s theory of seafloor spreading? Check all that apply.fossils of the same animals found in different areasthe direction iron in ocean rocks pointsthe tilt and rotation of the Earth’s axisthe age of different rocks on Earth’s surfacepillow-shaped rocks found in the sea
A scientist is studying rock formations. She notices some unusual rocks like those pictured here. What can she conclude about this area?
How does Earth’s magnetic field provide evidence for seafloor spreading?
Look at the diagram and then answer the following questions.
Wally is a planetologist in the future. He discovers a planet similar to Earth that has two major oceans. Ocean A is very large and looks like it has baseball stitches down its center. Ocean B is very small and has volcanoes all along one side. Wally needs to predict what the planet will look like far into the future. Which prediction would most likely come true?
mid-ocean ridgevolcano✔ deep-ocean trench
Look at the diagram and then answer the following questions.
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